Math Is Fun Forum

Amctest123

Member

Registered: 2017-10-20

Posts: 1

7x + 11y = N

What's the biggest value of N where N is not a solution?
x and y is non negative integers

Bob

Administrator

Registered: 2010-06-20

Posts: 10,619

Re: 7x + 11y = N

Hi Amctest 123

Welcome to the forum.

There is an entire "family" of straight lines where 7x+ 11y = something.

They are all parallel and as N gets bigger the lines move away from the origin. Joining (11,0) to (0,7) will produce one.  What is N for this case?

That should give you a starting point.

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob